Following their betrayal of the Syndicate, Hei and Yin are now fugitives on the run. Their escape leads them to encounter Suou Pavlichenko, a young Eurasian girl caught in the midst of a power struggle involving various factions and Contractors. As Tokyo's Hell's Gate looms, Hei's actions have prevented a catastrophic event, yet Contractors continue to exploit their abilities unchecked. Meanwhile, Misaki Kirihara faces a surge in Contractor-related incidents while navigating the Syndicate's influence within global law enforcement agencies. With Japan and Russia as the primary backdrop, a complex web of alliances and conflicts unfolds in this gripping sequel.